CN104734781A - Optical transceiver with serial-parallel conversion function - Google Patents
Optical transceiver with serial-parallel conversion function Download PDFInfo
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Abstract
The invention discloses an optical transceiver with a serial-parallel conversion function, and aims at providing a device which can switch a low-speed parallel electric signal and a high-speed serial optical signal. The optical transceiver is composed of a light emitting module and a light receiving module. The light emitting module is composed of N stages of time-sharing modulation submodules, a transmitting terminal pulse type driver and a first light absorption device. Each stage of time-sharing modulation submodule is composed of a first optical switch, a light modulator and a light beam combination device. The light receiving module is composed N stages of time-sharing demodulation submodules, a parallel shaping amplifier array, a receiving end pulse type driver and a second light absorption device, wherein the N stages of time-sharing demodulation submodules are connected to an optical signal bus in series through light delay lines. Each stage of time-sharing demodulation submodule is composed of a second optical switch and a light detector. By means of the optical transceiver, serial-parallel conversion can be conducted on a light path while photovoltaic conversion is conducted, the link serial rate is increased, the bandwidth of a processor chip interface is increased, the power consumption in the information transmission process is lowered, and the signal quality of communication links is improved.
Description
Technical field:
The present invention relates to the photoelectric conversion technique in chip optical interface and serioparallel exchange technology, be specifically related to a kind of optical transceiver, it can realize serioparallel exchange function while completing opto-electronic conversion.
Background technology:
Along with high-performance computer computational speed is from petaflops level to the continuous lifting of 1 hundred million levels, the disposal ability of microprocessor chip to information significantly improves, exchanges data amount in high-performance computer system between computing node increases with exponential, constantly promotes the demand of internetwork interface bandwidth.On the other hand, very large scale integration technology approaches its physics limit day by day, especially the connection communication between the processor chips and processor chips of high-performance computer, between processor chips and high-speed memory chip, proposes requirements at the higher level to the communication bandwidth of interference networks on plate and delay.And traditional electrical interconnection mode is limited to the problems such as performance, bandwidth, loss, crosstalk, wiring density, loss, chip pin number, the demand of high-performance computer to interference networks bandwidth cannot be met gradually.Comprise the mainstream high performance such as the National University of Defense technology, IBM, Cray computer manufacturer at present with performance is better, bandwidth is higher, loss is less, power consumption is lower and light network technology field of interconnects between plate without crosstalk replaces electrical interconnection technology comprehensively.Simultaneously, the main flow processor production firms such as IBM, Intel are also greatly developing silicon base CMOS photoelectricity hybrid integration technology, formulate the optical interface specification of chip, by Digital Logical Circuits, analog radio frequency circuit and light path element hybrid integrated on same silicon base chip, making the conversion between parallel electric signal and serial optical signal no longer be limited to chip pin number, having prepared solid technique optimized integration for realizing optical interface processor chips.
Due to Digital Logical Circuits process is the low speed telecommunication number of highly-parallel, and optical communication link transmission is the high-speed optical signal of serial, the optical interface of chip needs to complete the serioparallel exchange of the low-speed parallel signal of telecommunication and opto-electronic conversion obtains high speed serialization light signal at chip internal.The chip optical interface implementation that each manufacturer proposes at present is the integrated chip to existing opto-electronic conversion scheme mostly, substantially realizing principle is serioparallel exchange and opto-electronic conversion are independently completed, then adopts multi-chip package technology or Single-Chip Integration technology to complete the integrated of optical interface.In this scenario, between the low-speed parallel signal of telecommunication and high speed serialization light signal be indirect conversion using the high speed serialization signal of telecommunication as transition: adopt high speed serial parallel exchange circuit (SerDes) to convert the low-speed parallel signal of telecommunication to the high speed serialization signal of telecommunication; Then, adopt that high-speed driving (Driver) amplifies the modulation of (Amplifier) circuit and light, sensitive detection parts convert the high speed serialization signal of telecommunication to high speed serialization light signal.Owing to adopting two-stage indirect conversion, and need the high speed serialization signal of telecommunication as transition, this brings a lot of restriction to traditional scheme.First, although light network technology has the advantage of low-power consumption, but traditional scheme has continued to use the SerDes circuit of high power consumption, make the power consumption of consumption in transmitting procedure still greatly, with EDR (the Enhanced Data Rate of single channel 25Gbps in the market, strengthening speed) technology is example, the power consumption of SerDes circuit has accounted for more than 75% of node I/O chip total power consumption, for this ratio of router chip especially up to more than 90%.Secondly, although the single pass Theoretical Rate of optical communication can reach more than 100Gbps, the modulation /demodulation speed of silicon-based modulator and detector also reaches more than 56Gbps at present, but high speed SerDes circuit needed for indirect conversion there is no the high-speed electrical signals that method provides two-forty like this at present, high-speed driving amplifying circuit also cannot be operated in so high frequency, which has limited the potential of light as communication carrier, and then limit the lifting of link serial rate, constrain the interface bandwidth of processor chips.Finally, because the needs high speed serialization signal of telecommunication is as transition, the transmission range problem of the high speed serialization signal of telecommunication on pcb board and clock skew problem bring very large challenge also to the design of pcb board.
Summary of the invention:
The technical problem to be solved in the present invention is to provide the direct conversion solution between a kind of low-speed parallel signal of telecommunication and high speed serialization light signal, in light path, serioparallel exchange is realized while carrying out opto-electronic conversion, break away from the dependence of existing optical transceiver indirect conversion to high power consumption SerDes circuit, remove the high speed serialization signal of telecommunication to the restriction of modulating frequency, reduce the power consumption in message transmitting procedure, and promote processor chips interface bandwidth.
For solving the problems of the technologies described above, the technical solution used in the present invention is: utilize time-division multiplex technology, lead delay line (abbreviation optical delay line) by the optical switch switched at a high speed and the light carrier accurately controlled and realize serioparallel exchange in light path, optics docks with modulation/demodulation circuit with parallel low frequency signal, avoid the high-speed electrical signals being with coding to occur cleverly, modulation-demodulation circuit is operated between low primary frequency zone.Contour for ensureing the amplitude of the signal that each modulation channels exports, the present invention adopts the optical switch segmentation continuous light source switched at a high speed, produces independently light-pulse generator, to avoid the interference each other of each modulation channels to every road modulation channels.(dominant frequency is direct conversion f) and between the serial optical signal of N frequency multiplication (signal period is τ) to realize N (N is natural number) road parallel electric signal.Pass between degree of parallelism N, dominant frequency f and serial optical signal period tau is Nf τ=1.Concrete technical scheme is as follows:
Containing an accessible site optical transceiver for serioparallel exchange function, be made up of light emission module and Optical Receivers, as shown in Figure 1.Light emission module receives parallel input electrical signal, continuous light source, transmit clock from the input of optical transceiver, and under the driving of transmit clock, complete the conversion of parallel electric signal to serial optical signal, namely realizes modulation function and serialization, exports serial optical signal; Optical Receivers receives serial optical signal, receive clock from the input of optical transceiver, and under the driving of receive clock, complete the conversion of serial optical signal to parallel electric signal, namely realizes demodulation function and de-serialization, exports the parallel output signal of telecommunication.Light emission module and Optical Receivers separate, be transmit clock and the receive clock independence coordinate synchronization of dominant frequency f by two cover frequencies respectively.
As shown in Figure 2, light emission module (is designated as first order time division modulation submodule, second level time division modulation submodule by the N level time division modulation submodule connected by optical delay line, N level time division modulation submodule, the 26S Proteasome Structure and Function of each grade of time division modulation submodule is identical), transmitting terminal impulse type driver and the first light absorber form, the input of light emission module connects input electrical signal, continuous light source, transmit clock, the output output optical signal of light emission module.Because the light of N level time division modulation submodule input and output is divided into the light carrier comprising light signal and the light carrier two kinds not containing light signal, in N level time division modulation submodule, continuous light source and transmission are not called light source bus containing the optical delay line of light signal, transmission package is called optical signal bus containing the optical delay line of light signal, light source bus and optical signal bus are logical concept, physical entity are all optical delay lines.The note effective refractive index of light in silicon waveguide be r (r be more than or equal to 1 real number), the light velocity is c, produce the delay that duration is τ (i.e. the signal period of serial optical signal), then arrange the optical delay line of length l=c τ/r.Light emission module receives transmit clock, continuous light source and input electrical signal from input, transmitting terminal impulse type driver is under the driving of transmit clock, to the transmitting terminal voltage-type driving pulse that the N level time division modulation submodule parallel output N road cycle is N τ, pulsewidth equals τ, amplitude is 5 ~ 7V, driving N level time division modulation submodule simultaneously.N level time division modulation submodule walks abreast from input parallel receive N road input electrical signal, from transmitting terminal impulse type driver parallel receive N road transmitting terminal voltage-type driving pulse; The input of first order time division modulation submodule in light source bus of N level time division modulation submodule connects continuous light source, and as the carrier source of whole light emission module, the input on optical signal bus puts sky; Connect at light source bus one section of optical delay line that length is l between the adjacent time division modulation submodule of N level time division modulation submodule, this section of optical delay line receives light carrier from upper level time division modulation submodule, producing duration is the delay of τ, light carrier after postponing is transferred to next stage time division modulation submodule, as next stage time division modulation submodule in the input in light source bus; On optical signal bus, the optical delay line that a section identical is also had between adjacent time division modulation submodule, this section of optical delay line receives light carrier from upper level time division modulation submodule, producing duration is the delay of τ, light carrier after postponing is transferred to next stage time division modulation submodule, as next stage time division modulation submodule in the input on optical signal bus; The output of N level time division modulation submodule in light source bus accesses the first light absorber, residual light absorbs by the first light absorber, avoid reverberation to disturb, the output of N level time division modulation submodule on optical signal bus is as the serial optical signal of the output transmitting N frequency multiplication of whole light emission module.When transmitting terminal voltage-type driving pulse is in low level, N level time division modulation submodule receives continuous light source from light source bus simultaneously, inputs as light source bus; When transmitting terminal voltage-type driving pulse is in high level, N level time division modulation submodule downloads from light source bus the light pulse carrier wave that pulsewidth is τ simultaneously, input electrical signal is modulated to after on light pulse carrier wave simultaneously and uploads to optical signal bus simultaneously, be spliced into the serial optical signal of N frequency multiplication, realize the parallel-serial conversion between the low-speed parallel signal of telecommunication and high speed serialization light signal and electro-optic conversion, (dominant frequency is direct conversion f) and between the serial optical signal of N frequency multiplication (signal period is τ) namely to realize N road parallel electric signal.
N level time division modulation submodule is the modulating unit in light emission module, in N level time division modulation submodule, the 26S Proteasome Structure and Function of each grade of time division modulation submodule is identical, realize electro-optic conversion, as shown in Figure 3, each grade of time division modulation submodule is by the first optical switch, optical modulator and combiner device are formed, the input of each grade of time division modulation submodule connects input electrical signal, the optical delay line (referred to as optical signal bus input) of transmitting optical signal bus input light carrier, the optical delay line (referred to as light source bus input) of transmission light source bus input light carrier, transmitting terminal impulse type driver, the output of each grade of time division modulation submodule connects the optical delay line (exporting referred to as optical signal bus) that transmitting optical signal bus exports light carrier, as the optical delay line (exporting referred to as light source bus) that light source bus exports.First optical switch is connected in light source bus, light carrier can be delivered to two different outputs by the first optical switch under different applied voltage effect: when without applied voltage, the light source bus input light carrier received from the first optical switch input exports from light source bus output, through the first optical switch of optical delay line input next stage time division modulation submodule; When there being the applied voltage effect of 5 ~ 7V, the light source bus received from the first optical switch input inputs light carrier by the optical modulator downloaded to from light source bus time division modulation submodule at the corresponding levels.First optical switch from the transmitting terminal voltage-type driving pulse that transmitting terminal impulse type driver receiving cycle is N τ, pulsewidth is τ, amplitude is 5 ~ 7V, from light source bus input reception one arrange the cycle be N τ, pulsewidth is the light carrier pulse of τ; When transmitting terminal voltage-type driving pulse is in low level, the light carrier received from light source bus input directly exports from light source bus output by the first optical switch, through the first optical switch of optical delay line input next stage time division modulation submodule; When transmitting terminal voltage-type driving pulse is in high level, the light carrier pulse received from light source bus input is downloaded to optical modulator by the first optical switch; Optical modulator receives input electrical signal from input, receives light carrier pulse from the first optical switch, by the input electrical signal directly modulation that receives in light carrier pulse, exports the pulsed optical signals after modulation to combiner device; Combiner device is from input receiving optical signals bus input light carrier, the pulsed optical signals of time division modulation submodule at the corresponding levels modulation generation is received from optical modulator, pulsed optical signals and optical signal bus are inputted light carrier and closes the light carrier after restrainting, exported the combiner device giving next stage time division modulation submodule by optical signal bus.
Optical Receivers (is designated as first order timesharing demodulation submodule, second level timesharing demodulation submodule by the N level timesharing demodulation submodule be connected on by optical delay line on optical signal bus, N level timesharing demodulation submodule), parallel shaping amplifier array, receiving terminal impulse type driver and the second light absorber form, as shown in Figure 4, the input of Optical Receivers connects light signal, receive clock, and the output of Optical Receivers exports N road parallel electric signal.Receiving terminal impulse type driver is from the input input receive clock of Optical Receivers, to the receiving-end voltage type driving pulse that the N level timesharing demodulation submodule parallel output N road cycle is N τ, pulsewidth is τ, amplitude is 5 ~ 7V under the driving of receive clock, the demodulation of driving N level timesharing simultaneously submodule.The input of first order timesharing demodulation submodule on optical signal bus of N level timesharing demodulation submodule receives the serial optical signal of N frequency multiplication from the input of Optical Receivers; Have a segment length to be the optical delay line of l in N level timesharing demodulation submodule between adjacent timesharing demodulation submodule, producing duration is the delay of τ, is divided into by sequential serial light signal N number of pulsewidth to be the signal pulse of τ simultaneously; The output of N level time division modulation submodule on optical signal bus accesses the second light absorber, and residual light absorbs by the second light absorber, avoids reverberation to disturb.N level timesharing demodulation submodule simultaneously receives from receiving terminal impulse type driver the receiving-end voltage type driving pulse that the N road cycle is N τ, pulsewidth is τ, amplitude is 5 ~ 7V; When receiving-end voltage type driving pulse is in low level, N level timesharing demodulation submodule is simultaneously the serial optical signal of τ from optical signal bus input reception N frequency multiplication, signal period, inputs as N level timesharing demodulation submodule optical signal bus; When receiving-end voltage type driving pulse is in high level, the serial optical signal inputted from optical signal bus is divided into N number of pulsewidth to be the signal pulse of τ by N level timesharing demodulation submodule simultaneously, and parallel shaping amplifier array is delivered in the current mode signal pulse being converted to N road parallel.Parallel shaping amplifier array is from the input input receive clock of Optical Receivers, receive from N level timesharing demodulation submodule the current mode signal pulse that the N road cycle is N τ, pulsewidth is τ, amplitude is about 1mA, the N road current mode signal shaping pulse sent here by N level timesharing demodulation submodule under the driving of receive clock, to be enlarged into frequency that N road walks abreast be that the standard difference of f exports the signal of telecommunication and exports.
N level timesharing demodulation submodule is the demodulating unit in Optical Receivers, in N level timesharing demodulation submodule, the 26S Proteasome Structure and Function of each grade of time division modulation submodule is identical, realize opto-electronic conversion, as shown in Figure 5, each grade of timesharing demodulation submodule is formed by the second optical switch and photo-detector, the input of each grade of timesharing demodulation submodule connects optical signal bus input and receiving terminal impulse type driver, and output connects parallel shaping amplifier array and optical signal bus exports.Second optical switch is identical from the operation principle of the first optical switch in light emission module: light carrier can be delivered to two different outputs by the second optical switch under different applied voltage effect: when without applied voltage, the optical signal bus input light carrier received from the second optical switch input exports from optical signal bus output, through the second optical switch of optical delay line input next stage timesharing demodulation submodule; When there being the applied voltage effect of 5 ~ 7V, the optical signal bus received from the second optical switch input inputs light carrier by the optical modulator downloaded to from optical signal bus timesharing demodulation submodule at the corresponding levels.Second optical switch is connected on optical signal bus, from optical signal bus input reception one arrange the cycle be N τ, pulsewidth is the pulsed optical signals of τ, from the receiving-end voltage type driving pulse that receiving terminal impulse type driver receiving cycle is N τ, pulsewidth is τ, amplitude is 5 ~ 7V, when receiving-end voltage type driving pulse is in low level, the pulsed optical signals received from optical signal bus input directly exports from optical signal bus output by the second optical switch, through the second optical switch of optical delay line input next stage timesharing demodulation submodule; When receiving-end voltage type driving pulse is in high level, the pulsed optical signals received from optical signal bus input is downloaded to local photo-detector by the second optical switch, the pulsed optical signals of reception is directly converted to current mode signal pulse by photo-detector, exports to parallel shaping amplifier array.
To the first optical switch, optical modulator, combiner device, the second optical switch and the not requirement of photo-detector parts selection in the present invention.But for realizing integrability and avoiding temperature fluctuation on the impact of optical switch performance, the first optical switch and the second optical switch can select waveguide Mach-Zehnder (Mach-Zehnder, MZ) type optical switch.For realizing signal of telecommunication directly modulation, simultaneously also for realizing integrability and avoiding temperature fluctuation on the impact of optical modulator performance, optical modulator can select the waveguide Mach-Zender electroabsorption modulator of low-power consumption.
The oscillogram of the inner each main signal of optical transceiver of the present invention as shown in Figure 6.Each submodule of light emission module inside is by transmit clock coordinate synchronization.The code boundary alignment of the input electrical signal of transmit clock and input light emission module.By the control of transmit clock rising edge and trailing edge, the code border that the transmitting terminal voltage-type driving pulse that transmitting terminal impulse type driver is exported compares input electrical signal postpones half clock cycle, i.e. N τ/2.When transmitting terminal voltage-type driving pulse is in high level, half clock cycle of the optical switch in light emission module before the light carrier pulse of downloading from light source bus, input electrical signal has crossed a yard border, and drives optical modulator switching state.Optical modulator has the time slot completion status of half clock cycle to switch, and reaches stable state, waits for passing through of light carrier pulse, modulates light carrier pulse.By this mechanism, realize with modulator at a slow speed the modulation of fast signal.Each submodule of Optical Receivers inside is by receive clock coordinate synchronization.Under the driving of receive clock, align with receive clock in the code border that parallel shaping amplifier array exports the signal of telecommunication.By the control of receive clock rising edge and trailing edge, the code border of the receiving-end voltage type driving pulse phase specific output signal of telecommunication that receiving terminal impulse type driver is exported shifts to an earlier date half clock cycle, to guarantee that the pulsed optical signals that the optical switch in Optical Receivers is downloaded from optical signal bus under the driving of received pulse has the time slot of half clock cycle to complete detecting and identifying, after half clock cycle, export the signal of telecommunication corresponding with light signal by shaping amplifier.
The present invention has following advantage containing the optical transceiver of serioparallel exchange function:
1, link serial rate is high.Directly change between the low-speed parallel signal of telecommunication and high speed serialization light signal, high speed SerDes circuit needed for indirect conversion need not be limited to there is no method at present high-speed electrical signals is provided, high-speed driving, amplifying circuit also cannot be operated in the constraint in high-frequency, give full play to the potential of light as communication carrier, the serial data link being greater than 60Gbps can have been realized;
2, low in energy consumption.Directly change between the low-speed parallel signal of telecommunication and high speed serialization light signal, avoid the indirect conversion between the conventional optical transceivers dependence high speed Serdes circuit realiration low-speed parallel signal of telecommunication and high speed serialization light signal, avoid the high power consumption of Serdes circuit;
3, signal integrity is good.The high-speed electrical signals of total system not with coding, the high speed signal of band coding all occurs with light signal form, ensure that the signal quality of communication link;
4, pcb board design difficulty is reduced.Directly change between the low-speed parallel signal of telecommunication and high speed serialization light signal, do not need the high speed serialization signal of telecommunication as transition, avoid the challenge that the transmission range problem of the high speed serialization signal of telecommunication on pcb board and clock skew problem are brought to pcb board design.
Accompanying drawing illustrates:
Fig. 1 is the optical transceiver structure chart that the present invention contains serioparallel exchange function.
Fig. 2 is the structure chart of light emission module in optical transceiver of the present invention.
Fig. 3 is the structure chart of time division modulation submodule in light emission module of the present invention.
Fig. 4 is the structure chart of Optical Receivers in optical transceiver of the present invention.
Fig. 5 is the structure chart of timesharing demodulation submodule in Optical Receivers of the present invention.
Fig. 6 is sequential and the oscillogram of optical transceiver work of the present invention.
Embodiment:
Hereafter for 20 frequency doubled light transceivers of 2.5GHz dominant frequency, i.e. f=2.5GHz, τ=20ps, N=20, be described the optical transceiver containing serioparallel exchange function of the present embodiment, wherein numbering is all from 0.
1, the work dominant frequency of optical transceiver is 2.5GHz, and transmit clock and receive clock frequency are 2.5GHz, and one claps 400ps.Input electrical signal, to export the frequency of the signal of telecommunication also be 2.5GHz, input electrical signal and transmit clock rising edge alignment, the rising edge alignment that the output signal of telecommunication aligns with receive clock.The light serial signal that optical transceiver exports is 20 frequencys multiplication of dominant frequency 2.5GHz, i.e. 50GHz.
2, light carrier adopts 1550nm infrared light, is provided by outer distributed feedback bragg grating (DFB) laser of sheet, and its effective refractive index in silicon waveguide is about 3, i.e. r=3.
3, light emission module comprises the 20 grades of time division modulation submodules be made up of 20 time division modulation submodules, a transmitting terminal impulse type driver and first light absorber.Each time division modulation submodule comprises first optical switch, an optical modulator and a combiner device.First optical switch adopts MZ type high-speed optical switch, and the first light absorber adopts MZ type electroabsorption modulator.Connected by a pair optical delay line between adjacent time division modulation submodule, light carrier is transferred to the entrance of next time division modulation submodule time of delay from the entrance of a time division modulation submodule is 20ps, and the time of delay from the outlet delivery of a time division modulation submodule to the outlet of next time division modulation submodule is also 20ps.Because the first optical switch is connected on access road, every only the first optical switch can provide the delay of about 7ps, and it is 200 μm that the delay line thus between adjacent time division modulation submodule on exit passageway is about, and the delay line on access road is about 130 μm.MZ type high-speed optical switch is in pass-through state when not having applied voltage, still propagates along light source bus from the light carrier of light source bus input; Be in crossing condition under applied voltage effect, be downloaded to local optical modulator from the light carrier of light source bus input.
4, Optical Receivers comprises the 20 grades of timesharing demodulation submodules be made up of 20 timesharing demodulation submodules, a parallel shaping amplifier array, a receiving terminal impulse type driver and second light absorber.Each timesharing demodulation submodule comprises second optical switch and a photo-detector.Second optical switch also adopts MZ type high-speed optical switch, and adjacent second optical switch is joined end to end by optical delay line.Light carrier is transferred to the entrance of next the second optical switch time of delay from the entrance of second optical switch is 20ps, because every only the second optical switch can provide the delay of about 7ps, the thus length of every section of delay line about 130 μm.MZ type high-speed optical switch is in pass-through state when not having applied voltage, and the light carrier inputted from optical signal bus is still propagated along optical signal bus; Under applied voltage effect, be in crossing condition, the light carrier inputted from optical signal bus is downloaded to local photo-detector.
5, transmitting terminal impulse type driver every 400ps under the driving of transmit clock trailing edge produces the transmitting terminal voltage-type driving pulse that a pulsewidth is 20ps, all first optical switches of light emission module are driven synchronously to open the download window that a width is 20ps, be divided into 20 pulsewidths to be the pulsed light of 20ps the continuous laser that Distributed Feedback Laser inputs, and download to 20 time division modulation submodules respectively simultaneously.The optical modulator of each time division modulation submodule had received input electrical signal to be modulated before 200ps, and in 200ps before light pulse enters optical modulator completion status switch, reach stable state.Light pulse is modulated by its light intensity after optical modulator.The optical signal bus that light pulse after modulation synchronously arrives respective time division modulation submodule through combiner device exports.The delay of 20ps is had between optical signal bus output due to adjacent time division modulation submodule, identical with the pulsewidth of light pulse, the light pulse that each time division modulation submodule exports is end to end by combiner device on exit passageway, the formation cycle is the 50GHz light serial signal of 20ps, completes the parallel low speed telecommunication number conversion to serial high-speed optical signal.
6, receiving terminal impulse type driver every 400ps under the driving of receive clock trailing edge produces the receiving-end voltage type driving pulse that a pulsewidth is 20ps, all second optical switches of optical receiver are driven synchronously to open the download window that a width is 20ps, be divided into 20 pulsewidths to be the pulsed light of 20ps the 50GHz light serial signal light of input, and download to 20 photo-detectors respectively simultaneously.The intensity-conversion of light pulse is that current pulse signal gives parallel shaping amplifier array by photo-detector.Parallel shaping amplifier array is tertiary structure, is respectively input stage, intergrade and output stage.Input stage carries out integration to the pulsed current signal received.Integration is triggered by receive clock trailing edge, and integration duration is 30ps, to take into account signal to noise ratio and signal integrity.The integral result of intergrade to input stage compares judgement, confirm output logic 0 or logical one, then output stage is according to the judged result of intergrade, the difference parallel output signal of telecommunication is exported under the triggering of rising edge clock, forming 20 tunnel dominant frequency is the parallel electric signal of 2.5GHz, completes the conversion of serial high-speed optical signal to parallel low speed telecommunication number.
Claims (8)
1., containing the optical transceiver of serioparallel exchange function, realize the direct conversion between serial optical signal that parallel electric signal that N road dominant frequency is f and N frequency multiplication, signal period are τ, N is natural number, and the pass between N, f, τ is Nf τ=1; It is characterized in that, described optical transceiver comprises light emission module and Optical Receivers, light emission module receives parallel input electrical signal, continuous light source, transmit clock from the input of optical transceiver, and under the driving of transmit clock, complete the conversion of parallel electric signal to serial optical signal, export serial optical signal; Optical Receivers receives serial optical signal, receive clock from the input of optical transceiver, and under the driving of receive clock, complete the conversion of serial optical signal to parallel electric signal, exports the parallel output signal of telecommunication; Light emission module and Optical Receivers separate, be transmit clock and the receive clock independence coordinate synchronization of dominant frequency f by two cover frequencies respectively;
Described light emission module is made up of N level time division modulation submodule, transmitting terminal impulse type driver and the first light absorber, N level time division modulation submodule comprise first order time division modulation submodule, second level time division modulation submodule ..., N level time division modulation submodule, the 26S Proteasome Structure and Function of each grade of time division modulation submodule is identical; The input of light emission module connects input electrical signal, continuous light source, transmit clock, output output optical signal; Transmitting terminal impulse type driver receives transmit clock from input, under the driving of transmit clock, to N level time division modulation submodule parallel output N road transmitting terminal voltage-type driving pulse, and driving N level time division modulation submodule simultaneously; N level time division modulation submodule walks abreast from input parallel receive N road input electrical signal, from transmitting terminal impulse type driver parallel receive N road transmitting terminal voltage-type driving pulse; The input of first order time division modulation submodule in light source bus of N level time division modulation submodule connects continuous light source, and the input on optical signal bus puts sky; Connect at light source bus one section of optical delay line between the adjacent time division modulation submodule of N level time division modulation submodule, this section of optical delay line receives light carrier from upper level time division modulation submodule, producing duration is the delay of τ, and the light carrier after postponing is transferred to next stage time division modulation submodule; On optical signal bus, the optical delay line that a section identical is also had between adjacent time division modulation submodule, this section of optical delay line receives light carrier from upper level time division modulation submodule, producing duration is the delay of τ, and the light carrier after postponing is transferred to next stage time division modulation submodule; The output of N level time division modulation submodule in light source bus accesses the first light absorber, and the output of N level time division modulation submodule on optical signal bus exports the serial optical signal of N frequency multiplication;
Described Optical Receivers is made up of the N level timesharing demodulation submodule be connected on by optical delay line on optical signal bus, parallel shaping amplifier array, receiving terminal impulse type driver and the second light absorber, N level timesharing demodulation submodule comprise first order timesharing demodulation submodule, second level timesharing demodulation submodule ..., N level timesharing demodulation submodule, the 26S Proteasome Structure and Function of each grade of timesharing demodulation submodule is identical; The input of Optical Receivers connects light signal, receive clock, and output exports N road parallel electric signal; Receiving terminal impulse type driver inputs receive clock from the input of Optical Receivers, to N level timesharing demodulation submodule parallel output N road receiving-end voltage type driving pulse under the driving of receive clock, and the demodulation of driving N level timesharing simultaneously submodule; The input of first order timesharing demodulation submodule on optical signal bus of N level timesharing demodulation submodule receives the serial optical signal of N frequency multiplication from the input of Optical Receivers; Have one section of optical delay line between adjacent timesharing demodulation submodule in N level timesharing demodulation submodule, producing duration is the delay of τ, is divided into by sequential serial light signal N number of pulsewidth to be the signal pulse of τ simultaneously; The output of N level time division modulation submodule on optical signal bus accesses the second light absorber; N level timesharing demodulation submodule receives N road receiving-end voltage type driving pulse from receiving terminal impulse type driver simultaneously; When receiving-end voltage type driving pulse is in low level, N level timesharing demodulation submodule is simultaneously the serial optical signal of τ from optical signal bus input reception N frequency multiplication, signal period, inputs as N level timesharing demodulation submodule optical signal bus; When receiving-end voltage type driving pulse is in high level, the serial optical signal inputted from optical signal bus is divided into N number of pulsewidth to be the signal pulse of τ by N level timesharing demodulation submodule simultaneously, and parallel shaping amplifier array is delivered in the current mode signal pulse being converted to N road parallel; Parallel shaping amplifier array is from the input input receive clock of Optical Receivers, receive the current mode signal pulse of N road from N level timesharing demodulation submodule, the N road current mode signal shaping pulse that N level timesharing demodulation submodule is sent here being enlarged into frequency that N road walks abreast under the driving of receive clock is that the standard difference of f exports the signal of telecommunication and exports.
2. the optical transceiver containing serioparallel exchange function as claimed in claim 1, it is characterized in that, in described N level time division modulation submodule, each grade of time division modulation submodule is formed by the first optical switch, optical modulator and combiner device, the input of each grade of time division modulation submodule connects input electrical signal, optical signal bus input, light source bus input, transmitting terminal impulse type driver, and the output of each grade of time division modulation submodule connects optical signal bus output, light source bus exports; First optical switch is connected in light source bus; First optical switch receives transmitting terminal voltage-type driving pulse from transmitting terminal impulse type driver, receives light carrier pulse from light source bus input; When transmitting terminal voltage-type driving pulse is in low level, the light carrier received from light source bus input directly exports from light source bus output by the first optical switch, through the first optical switch of optical delay line input next stage time division modulation submodule; When transmitting terminal voltage-type driving pulse is in high level, the light carrier pulse received from light source bus input is downloaded to optical modulator by the first optical switch; Optical modulator receives input electrical signal from input, receives light carrier pulse from the first optical switch, by the input electrical signal directly modulation that receives in light carrier pulse, exports the pulsed optical signals after modulation to combiner device; Combiner device is from input receiving optical signals bus input light carrier, the pulsed optical signals of time division modulation submodule at the corresponding levels modulation generation is received from optical modulator, pulsed optical signals and optical signal bus are inputted light carrier and closes the light carrier after restrainting, exported the combiner device giving next stage time division modulation submodule by optical signal bus.
3. the optical transceiver containing serioparallel exchange function as claimed in claim 1, it is characterized in that, in described N level timesharing demodulation submodule, each grade of timesharing demodulation submodule is formed by the second optical switch and photo-detector, the input of each grade of timesharing demodulation submodule connects optical signal bus input and receiving terminal impulse type driver, and output connects parallel shaping amplifier array and optical signal bus exports; Second optical switch is connected on optical signal bus, from optical signal bus input received pulse light signal, from receiving terminal impulse type driver input receiving-end voltage type driving pulse, when receiving-end voltage type driving pulse is in low level, the pulsed optical signals received from optical signal bus input directly exports from optical signal bus output by the second optical switch, through the second optical switch of optical delay line input next stage timesharing demodulation submodule; When receiving-end voltage type driving pulse is in high level, the pulsed optical signals received from optical signal bus input is downloaded to local photo-detector by the second optical switch, the pulsed optical signals of reception is directly converted to current mode signal pulse by photo-detector, exports to parallel shaping amplifier array.
4. the optical transceiver containing serioparallel exchange function as claimed in claim 1, is characterized in that, the length l=c τ/r of described optical delay line, wherein, r be more than or equal to 1 real number, r is the effective refractive index in the waveguide of light silicon, and c is the light velocity.
5. the optical transceiver containing serioparallel exchange function as claimed in claim 1, it is characterized in that, described transmitting terminal impulse type driver under the driving of transmit clock, to the transmitting terminal voltage-type driving pulse that the N level time division modulation submodule parallel output N road cycle is N τ, pulsewidth equals τ, amplitude is 5 ~ 7V; Described receiving terminal impulse type driver under the driving of receive clock, to the receiving-end voltage type driving pulse that the N level timesharing demodulation submodule parallel output N road cycle is N τ, pulsewidth is τ, amplitude is 5 ~ 7V under the driving of receive clock.
6. the optical transceiver containing serioparallel exchange function as claimed in claim 1, it is characterized in that, light carrier is delivered to two different outputs by described first optical switch under different applied voltage effect: when without applied voltage, the light source bus input light carrier received from the first optical switch input exports from light source bus output, through the first optical switch of optical delay line input next stage time division modulation submodule; When there being applied voltage effect, the light source bus received from the first optical switch input inputs light carrier by the optical modulator downloaded to from light source bus time division modulation submodule at the corresponding levels.
7. the optical transceiver containing serioparallel exchange function as claimed in claim 1, it is characterized in that, light carrier is delivered to two different outputs by described second optical switch under different applied voltage effect: when without applied voltage, the optical signal bus input light carrier received from the second optical switch input exports from optical signal bus output, through the second optical switch of optical delay line input next stage timesharing demodulation submodule; When there being applied voltage effect, the optical signal bus received from the second optical switch input inputs light carrier by the optical modulator downloaded to from optical signal bus timesharing demodulation submodule at the corresponding levels.
8., as claimed in any of claims 1 to 7 in one of claims containing the optical transceiver of serioparallel exchange function, it is characterized in that, described first optical switch and the second optical switch are waveguide Mach-Zender optical switch; Described optical modulator is waveguide Mach-Zender electroabsorption modulator.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105204398A (en) * | 2015-07-31 | 2015-12-30 | 许继集团有限公司 | Optical modulated signal communication and conversion device and converter valve control and protection system |
| CN105553557A (en) * | 2015-12-16 | 2016-05-04 | 华进半导体封装先导技术研发中心有限公司 | Optical receiving unit structure for optical fiber communication |
| CN105553915A (en) * | 2015-12-10 | 2016-05-04 | 中国人民解放军63908部队 | Demodulation method for intermittent radiation signal transient modulation parameter |
| CN108306678A (en) * | 2017-12-28 | 2018-07-20 | 国家电网公司 | A kind of single-photon source single photon output system and control method |
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| CN109901437A (en) * | 2017-12-07 | 2019-06-18 | 北京万集科技股份有限公司 | A kind of control device and control method of multichannel photoelectric conversion module |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1768496A (en) * | 2003-03-05 | 2006-05-03 | 奥普提维有限公司 | Optical time division multiplexing |
| JP2007028301A (en) * | 2005-07-19 | 2007-02-01 | Fuji Xerox Co Ltd | Optical signal processing apparatus |
| CN101494501A (en) * | 2008-01-25 | 2009-07-29 | 华为技术有限公司 | Multi-code type light transmitter and method for generating optical signal |
| JP2011015350A (en) * | 2009-07-06 | 2011-01-20 | Nippon Telegr & Teleph Corp <Ntt> | Optical transmission apparatus and optical transmission method |
| CN102224692A (en) * | 2008-11-25 | 2011-10-19 | 三星电子株式会社 | Visible ray communication system and method for transmitting signal |
| CN202050503U (en) * | 2011-03-11 | 2011-11-23 | 孙飞 | Multichannel uncompressed digital video optical fiber transmission device |
-
2015
- 2015-03-02 CN CN201510092732.2A patent/CN104734781B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1768496A (en) * | 2003-03-05 | 2006-05-03 | 奥普提维有限公司 | Optical time division multiplexing |
| JP2007028301A (en) * | 2005-07-19 | 2007-02-01 | Fuji Xerox Co Ltd | Optical signal processing apparatus |
| CN101494501A (en) * | 2008-01-25 | 2009-07-29 | 华为技术有限公司 | Multi-code type light transmitter and method for generating optical signal |
| CN102224692A (en) * | 2008-11-25 | 2011-10-19 | 三星电子株式会社 | Visible ray communication system and method for transmitting signal |
| JP2011015350A (en) * | 2009-07-06 | 2011-01-20 | Nippon Telegr & Teleph Corp <Ntt> | Optical transmission apparatus and optical transmission method |
| CN202050503U (en) * | 2011-03-11 | 2011-11-23 | 孙飞 | Multichannel uncompressed digital video optical fiber transmission device |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105204398A (en) * | 2015-07-31 | 2015-12-30 | 许继集团有限公司 | Optical modulated signal communication and conversion device and converter valve control and protection system |
| CN105553915A (en) * | 2015-12-10 | 2016-05-04 | 中国人民解放军63908部队 | Demodulation method for intermittent radiation signal transient modulation parameter |
| CN105553915B (en) * | 2015-12-10 | 2020-07-03 | 中国人民解放军32181部队 | Demodulation method for transient modulation parameters of intermittent radiation signals |
| CN105553557A (en) * | 2015-12-16 | 2016-05-04 | 华进半导体封装先导技术研发中心有限公司 | Optical receiving unit structure for optical fiber communication |
| CN109981175A (en) * | 2016-01-08 | 2019-07-05 | 华为技术有限公司 | The method of optical module and signal processing |
| CN109981175B (en) * | 2016-01-08 | 2021-10-01 | 华为技术有限公司 | Optical module and signal processing method |
| CN109901437A (en) * | 2017-12-07 | 2019-06-18 | 北京万集科技股份有限公司 | A kind of control device and control method of multichannel photoelectric conversion module |
| CN108306678A (en) * | 2017-12-28 | 2018-07-20 | 国家电网公司 | A kind of single-photon source single photon output system and control method |
| CN108306678B (en) * | 2017-12-28 | 2020-10-13 | 国家电网有限公司 | Single photon source single photon output system |
| CN108833243A (en) * | 2018-06-07 | 2018-11-16 | 浙江大学 | A kind of high speed optical data bus based on passive optic bus technology |
| CN108833243B (en) * | 2018-06-07 | 2020-05-29 | 浙江大学 | High-speed optical data bus based on passive optical bus technology |
| CN110336569A (en) * | 2019-06-06 | 2019-10-15 | 成都同相科技有限公司 | It is a kind of to realize high isolation and the RF switch device without standing wave variation |
| CN114586294A (en) * | 2019-11-14 | 2022-06-03 | 迈络思科技有限公司 | Voltage controlled electro-optic serializer/deserializer (serializer/deserializer) |
| WO2021227890A1 (en) * | 2020-05-13 | 2021-11-18 | 华为技术有限公司 | Computing system, server, and signal transmission method |
| CN112787722A (en) * | 2021-03-12 | 2021-05-11 | 苏州大学 | Self-adaptive dimming visible light communication system and modulation and demodulation method |
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